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(No Model.)

C. W. HUNT.

HISTING MACHINE.

No. 320.064. PatentedJune 16, 1885.

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CHARLES XV. HUNT, OF VEST NEV BRIGHTON,Y NEV YORK.

i-ioIsTlmcs-MACHINE.

SPECIFICATION forming part of Letters Patent No. 320,064, dated June 16, 1885.

Application filed January 20, 1885.

To all whom, it may concern:

Be it known that I, Grammes W. HUNT, of Vest New Brighton, in the county of Richmond and State of New York, have invented a new and use'ful Improvement in Hoisting- Machinery, and the following is declared to be a description of the same.

In dredging and hoisting machinery it is usual to employ in connection with the hoisting-engine and attendant apparatus two ropes or chains for closing, filling, and hoisting the bucket. A single chain has been employed for closing the buckets, but the chain terminated at and was connected to the hoist-wheel, and a separate device was used for opening.

By my improvement I am able to use only a single hoisting rope or chain. This rope or chain passes around a chain-wheel that actuates the mechanism that closes the buckets; and in order to obtain the necessary number of revolutions of this chain-wheel for closing the buckets with the required force the chain is paid out and the slack taken up by a weight or spring. Upon starting the hoisting-rope the chain draws under and rotates the' wheel and closes the bucket, the necessary amount of such chain or rope being supplied as the weight is raised.

In the drawings, Figure l is an elevation of part ofthe hoisting apparatus and ofthe buck et closed. Fig. 2 is an end elevation of the bucket and the opening mechanism, and Fig. 3 is a plan of the same.

A represents the boom of the hoisting apparatus; B, the hoisting-chain; C, the bucket; D, the chain-wheel, and E the weight.

The sections ofthe bucket C are carried by a framing in the usual manner, and the crossshaft a is supported in bearings upon said framing. Upon this cross-shaft a there is the chain-wheel D, a ratchet-wheel, b, clutch c, chain-drums d, and the chains c pass from the drums d to the bucket-sections. There is a pawl, f, to engage the ratchet-wheel b and a forked lever, g, t0 operate the clutch c, and these are pivoted upon the frame. The chainwheel D and half the clutch c are made together and are loose upon the shaft a,while the ratchet-wheel b is fast upon the shaft and the half-clutch slides upon a feather upon the shaft.

(No model.)

The clutch is thrown in and engages the chain-wheel while the buckets are being closed, and the ratchet-wheel and pawl keep the shaft and chain-dru1ns from turning back and hold the buckets closed. After the bucket has been closed the clutch is disengaged to free the chain-wheel, so that it can revolve as a loose pulley in raising the bucket.

The operation is as follows: Prcsuming that the bucket has reached its highest point and has discharged its load and remains open, the hoisting-engine pays out the chain B and the open bucket descends until it reaches its destination. The paying-out operation is continued, and the slack of the chain is taken up by the weightE descending. Vhen the weight has descended asufiicicnt distance,the paying out is stopped, the clutch c is thrown in, and the engine started ahead, drawing in the rope and elevating the weight and revolving the chain-wheel D, clutch c, shaft a, and drums d, thus winding up the chains e and closing and loading the bucket. This is made possible because the bucket is heavier than the weight E and the force needed to close the bucket combined. The bucket is closed by the time the weight E reaches its highest point at the pulley o and stops. The .clutch c is then disengaged, freeing the chain -wheel D, the ratchet-wheel l) and pawl f holding the buckets closed. The further drawing in of the chain raises the bucket to the required height and the pawl f is disengaged to open the said bucket and release its contents.

Instead of the weight E depending from the end of the rope and rising and falling in a perpendicular line, it may be carried by a slideway upon the boom, as shown by dotted lines in Fig. l, or the weight might be dispensed with and the rope be wound upon Aa spring-drum upon the boom, as also shown in Fig. 1 by dotted lines.

I claim as my inventionl. The combination, with the hoistingbucket and the wheel and mechanism for closing the same, of a chain and a weight attached to that chain whereby the weight is made to take up the slack of the chain as paid out, and the weight is raised when the chain is drawn upon in closing the bucket before the bucket is raised, substantially as specified.

IOO

2. Thev combination, with they hoistingcomes .a loose pulley, substantially as set ro bucket and the mechanism for closing the forth. same, of a Wheel around which a rope or chain Signed by me this 15th day of January, A.

passes, means for drawing upon that rope or D. 1885. g i chain and rotating. the Wheel until the 4bucket is closed, and then elevating the bucket by CHARLES HUNT' further drawing upon the same rope or chain, Witnesses: and with mechanism, substantially as speci- GEO T. PINCKNEY,

fled, for detaching said wheel so that it be- WILLIAM G. MoT'r. 

